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Cleaning compositions incorporating green solvents and methods for use

a technology of green solvents and cleaning compositions, applied in the field of cleaning compositions, can solve the problems of undesirable compositions, flashpoints that are also extremely flammable, and are not environmentally friendly, and achieve the effects of low vapor pressure, low odor, and high flash poin

Active Publication Date: 2012-07-17
SPECIALTY OPERATIONS FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The composition meets low VOC exemption criteria, is environmentally friendly, and provides high cleaning efficacy on a range of stains without damaging surfaces, outperforming conventional cleaners in removing permanent marker ink and other tough stains.

Problems solved by technology

Many ink cleaning compositions contain aromatic groups that are in many cases toxic and are not environmentally friendly in that they do not biodegrade well.
Often these solvents will be low vapor pressure solvents with low flashpoints that are also extremely flammable.
Such compositions are undesirable in light of the increased awareness for human exposure to toxic materials and the demand for environmentally friendly, non-toxic solvents.
However, the drawbacks in utilizing these solvents have not diminished their use.
As another example with respect to surface (e.g., painted surface) cleaners, most commercially available cleaners contain hazardous or aggressive solvents that can remove some stains, but pose health hazards, fire hazards and / or have strong odors.
The use of these and related solvents is also not desirable because of the potential pollution and environmental problems associated with the disposal of such solvents.
In addition, cleaners containing aggressive solvents also damages the underlying substrates that are being treated, such as painted surfaces, wood, carpet, and the like.
These kinds of cleaners may pose health hazards, fire hazards and have strong odors.
It is also possible that aggressive formulation may permanently damage clothing and textiles.
It is, however, very difficult to completely remove permanent marker from many of these substrates, in particular plastic substrates.
Generally, there is currently no satisfactory environmentally friendly cleaner for removing permanent marking pen from these substrate surfaces.
Most of the commercially available “eco-friendly” cleaners are generally formulated for cleaning house-hold stains such as pen, crayons, pencils, lipsticks, washable marker and the like, but are not strong enough for hard-to-clean stains such as permanent marker and the like.
In addition, even if such cleaners can clean most of the permanent ink from the substrate, in most cases there remains some visible markings on the substrates.
On the other hand, other cleaners contain hazardous or aggressive solvents such as NMP (N-methyl pyrrolidinone).
These kinds of cleaners may pose health hazards, fire hazards and have strong odors.
It is also possible that aggressive formulation may permanently damage the applied-upon substrates.
The availability of environmentally friendly solvents, however, is limited because such alternatives generally do not provide satisfactory performance.

Method used

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  • Cleaning compositions incorporating green solvents and methods for use
  • Cleaning compositions incorporating green solvents and methods for use
  • Cleaning compositions incorporating green solvents and methods for use

Examples

Experimental program
Comparison scheme
Effect test

example 1

Saturated Hydrocarbon (Isopar L™)

[0157]Isopar L™ is a high boiling mixture of saturated alkanes from Exxon with a described flash point of 68° C. and an evaporation rate of 0.06 (nBuAc=100). The solubility of UV Curable ink Nuvaflex™ 3003 (Cyan) from Zeller Gmellin was studied when the solvent was blended with a blend of MGN esters according to the present invention as shown in FIG. 1, below. Samples were prepared by dispensing aliquots (5 mL) of solvent blends into a series of vials with a progressive variation in MGN blend content. A drop of ink (0.012-0.015 g) was added to the solvent blend which sinks and deposits on the bottom of the vial. The solution was then mixed by repeated aspiration of 0.5 ml of the solvent with a micropipette 5 times. The solution was then allowed to stand for at least 24 hr. The ink is insoluble in neat Isopar L™. Increasing the MGN blend content increases the solubility of ink the blend. The cross over to complete solubility based on FIG. 10 occurs be...

example 2

Unstaurated Hydrocarbon (HiSol™ 70R)

[0158]Hisol™ 70R is an aromatic solvent with a described high evaporation rate compared to Isopar™ L. The solubility of UV Curable ink Nuvaflex™ 3003 (Cyan) from Zeller Gmellin was studied when the solvent (HiSol™ 70R) was blended with the MGN blend as photographically shown in FIG. 11. Samples were prepared by dispensing aliquots (5 mL) of solvent blends into a series of vials with a progressive variation in MGN blend content. A drop of ink (0.012-0.015 g) was added to the solvent blend which sinks and deposits on the bottom of the vial. The solution was then mixed by repeated aspiration of 0.5 ml of the solvent with a micropipette 5 times. The solution was then allowed to stand for at least 24 hr. It was observed that the ink is insoluble in HiSol™ 70R alone. Addition of the MGN blend of the present invention improves the solubility of ink with the crossover to complete solubility with an optically dense solution occurring between 30-40% MGN ble...

example 3

Oxygenated Solvents: Methyl Oleate (Fatty Acid Methyl Ester)

[0159]Fatty acid methyl esters sourced from various vegetable oils are touted to be more environmentally friendly which can replace some of the hazardous solvents used in the printing ink industry. Soy methyl esters (Methyl Soyate), Tall Oil mono-methyl esters are some examples of these environmentally-friendly solvents. These solvents, however, may not have the necessary solvency or the dissolution rates that are necessary at times for application in the printing industry. Methyl Oleate (C18 insaturated FAME) is one of the key ingredients of most such mono-methyl esters derived from disparate sources. Methyl oleate from Novance Inc (Phytorob™ 960.65) was used in this study. The solubility of UV Curable ink Nuvaflex™ 3003 (Cyan) from Zeller Gmellin was studied when the solvent (Me-Oleate) was blended with a particular dibasic ester blend AGS (dimethyl glutarate / succinate / adipate blend=63 / 24 / 13) as photographically shown in ...

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Abstract

An environmentally-friendly cleaning composition for industrial and consumer applications comprising (a) a blend of dibasic esters, (b) one or more surfactants (c) and, optionally, (d) water or a solvent. The dibasic esters are be derived from a blend of adipic, glutaric, and succinic diacids, and, in one particular embodiment, the blend comprises dialkyl adipate, dialkyl methylglutarate and dialkyl ethylsuccinate, wherein the alkyl groups individually comprise a C1-C12 hydrocarbon group. The one or more surfactants are typically chosen from alcohol alkoxylate, an alkyl phenol ethoxylate, a terpene, a terpene alkoxylate or any derivates thereof. Optionally, additional components or additives including delaminates such as pinene and d-limonene, fragrances, whiteners, stabilizers, thickeners and the like can be added to the composition. The industrial or consumer application selected from the group consisting of a graffiti cleaner, a painted-substrate cleaner, an ink cleaner, a metal substrate cleaner, a plastic substrate cleaner, an environmentally friendly cleaner, a stain-spot cleaner, an industrial hand cleaner, a resin cleaner, a tar resin cleaner, a textile cleaner, a paint stripper and any combination thereof.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The application claims benefit of U.S. Provisional Application No. 61 / 127,021, filed on May 9, 2008; U.S. Provisional Application No. 61 / 188,760, filed on Aug. 12, 2008; U.S. Provisional Application No. 61 / 191,897, filed on Sep. 12, 2008; U.S. Provisional Application No. 61 / 212,545, filed Apr. 13, 2009; herein incorporated by reference.FIELD OF THE INVENTION[0002]This invention relates to cleaning compositions that are environmentally friendly, biodegradable, non-toxic and non-flammable with low odor, low vapor pressure and low volatile organic compound (VOC) content and, more particularly, cleaning compositions utilized for multiple consumer and industrial applications.BACKGROUND OF THE INVENTION[0003]Many commercially available cleaners incorporate environmentally hazardous and toxic volatile organic compounds (VOCs). It has been found that VOCs are linked to ozone formation and contributed significantly other health hazards. In the pri...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C11D9/26
CPCC08G65/3314C08L71/02C09D9/04C11D3/2093C11D3/43C11D11/0017C11D11/0023C11D2111/14C11D2111/12
Inventor TRIVEDI, SATYENFLUCK, DAVIDSEHGAL, AMITOSBORNE, ALEXANDRADAHANAYAKE, MANILAL S.TALINGTING-PABALAN, RUELARUIZ, JOSEAYMES, CHARLES
Owner SPECIALTY OPERATIONS FRANCE
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